Ninja Shadow Mosquito, XYZ 2

XYZ Overlay (Exile {x} creatures and put an XYZ counter on each of them. {x} cannot be less than 2.)

Indestructible, Hexproof

Creatures opponents control are goaded.

During damage calculation, if you're being targeted for an attack, you can {t}, remove an XYZ counter from an exiled card: negate the effects of a tapped creature an opponent controls, then that creature's controller loses life equal to its power.